The most common and most likely answer to this crossword clue is the 7 letter word PERGOLA
I've seen this crossword clue in Financial Times
P
E
R
G
O
L
A
More clues leading to the result PERGOLA
- A person selling pieces of wood, maybe: backing for garden structure
- Climbers on this mountain admitting a brute to ascend?
- Training frame, and therefore left in care of personal assistant
- Climbing frame formed by erecting a piece of wood?
- An account traveller set, up providing support for climbers
- Grape trained around sides of oval framework for plants
- For each climbing record, a climber may climb this
- Where climber may be trained in mountain, terrifying figure returning
- Wood salesman put up ace structure in garden
- Walk between the plants
Buddy explains!

The straight part
We know that "climber may climb this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case climber may climb this = pergola.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PERGOLA mean?
PERGOLA noun- A framework in the form of a passageway of columns that supports a trelliswork roof; used to support and train climbing plants
- Such a framework employed to provide shade, especially over a patio.